<?php
echo  5-2*6,"\n";
echo  (-3)**2,"\n";
echo  8/2*3,"\n";
//
echo "100000"+'234',"\n";
echo '234'+"100000","\n";
echo "100000"+'234',"\n";
echo "100000"+'0o234',"\n";
echo "100000"+'0x2A',"\n";
echo "100000"+'123aaa',"\n";
echo "100000"+'-2e2aaa',"\n";
//浮点数
echo  3.14,"\n";
echo  3.14e5,"\n";
echo  fmod(num1: 18.9,num2: 5.1),"\n";